In 1980 he finished fourth in the Swedish Formula Three Championship and competed in 1 race each in the British, European, and German F3 series.
In 1985 European F2 gave way to International Formula 3000 and Kaiser competed in 7 races and finished 4th at Thruxton Circuit, good enough for 14th in points.
[1] Alongside his driving career, Kaiser created Hello Sweden, a support and development program for emergent Swedish racing drivers.
Prominent drivers such as Thomas Danielsson, Kenny Bräck, Björn Wirdheim and Sebastian Hohenthal were some of the recipients of this support.
He was very close to signing for Brabham to race alongside Riccardo Patrese but he was denied a Superlicence.